Declines in greater bilby (Macrotis lagotis) geographic range and realised niche are best explained by the invasive red fox (Vulpes vulpes)

IF 4.9 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Hayley M. Geyle , Alys R. Young , Brett P. Murphy , Chris R. Dickman , Christine Schlesinger , Kelly M. Dixon , Harry Moore , Sarah Legge , Jennifer Silcock , Naomi Indigo , Martin Dziminski , Bruce Greatwich , Thomas M. Newsome , Rachel Paltridge , Rick Southgate , Cassandra Arkinstall , Kevin Bradley , Central Land Council Rangers , Nigel Jackett , Kanyirninpa Jukurrpa Rangers , Sam Banks
{"title":"Declines in greater bilby (Macrotis lagotis) geographic range and realised niche are best explained by the invasive red fox (Vulpes vulpes)","authors":"Hayley M. Geyle ,&nbsp;Alys R. Young ,&nbsp;Brett P. Murphy ,&nbsp;Chris R. Dickman ,&nbsp;Christine Schlesinger ,&nbsp;Kelly M. Dixon ,&nbsp;Harry Moore ,&nbsp;Sarah Legge ,&nbsp;Jennifer Silcock ,&nbsp;Naomi Indigo ,&nbsp;Martin Dziminski ,&nbsp;Bruce Greatwich ,&nbsp;Thomas M. Newsome ,&nbsp;Rachel Paltridge ,&nbsp;Rick Southgate ,&nbsp;Cassandra Arkinstall ,&nbsp;Kevin Bradley ,&nbsp;Central Land Council Rangers ,&nbsp;Nigel Jackett ,&nbsp;Kanyirninpa Jukurrpa Rangers ,&nbsp;Sam Banks","doi":"10.1016/j.biocon.2024.110872","DOIUrl":null,"url":null,"abstract":"<div><div>Understanding the factors driving species’ range and niche contractions can help us identify how and where threats to those species are being mediated or tolerated. Here, we used the ‘niche reduction hypothesis’ to investigate changes in the geographic range and realised niche of the greater bilby (<em>Macrotis lagotis</em>). We compiled bilby occurrence records to estimate changes in the geographic range (extent of occurrence, EOO) and realised niche for two time periods: historical (1900–2022) and contemporary (2000−2022). We used one-class support vector machine models to measure realised niche size, comparing decline in realised niche to decline in EOO through time. Ecological niche models (ENM) were then used to quantify environmental factors influencing the historical and contemporary realised niche, and to determine the extent to which environmental conditions may mediate threats (particularly introduced predators). Bilby EOO declined by 70% through time, while realised niche size declined by 46%. Fire frequency was an important predictor in both the historical and contemporary ENMs, while red fox (<em>Vulpes vulpes</em>) density became important only in the contemporary ENM, suggesting that foxes are contributing to contemporary bilby declines. Bilbies contracted to areas with lower fox densities, lower average normalised difference vegetation index values, higher fire frequency, and higher average temperatures. Environmental conditions likely limit fox distribution (leading to contraction of bilbies to fox-free areas) and/or mediate fox impacts (leading to greater population resilience to fox predation). Future research should enhance understanding of how environmental factors facilitate predator impacts and how these vary across environmental space. Such knowledge will likely improve understanding of how to manage threats facing bilbies across their distribution.</div></div>","PeriodicalId":55375,"journal":{"name":"Biological Conservation","volume":"302 ","pages":"Article 110872"},"PeriodicalIF":4.9000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Biological Conservation","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0006320724004348","RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"BIODIVERSITY CONSERVATION","Score":null,"Total":0}
引用次数: 0

Abstract

Understanding the factors driving species’ range and niche contractions can help us identify how and where threats to those species are being mediated or tolerated. Here, we used the ‘niche reduction hypothesis’ to investigate changes in the geographic range and realised niche of the greater bilby (Macrotis lagotis). We compiled bilby occurrence records to estimate changes in the geographic range (extent of occurrence, EOO) and realised niche for two time periods: historical (1900–2022) and contemporary (2000−2022). We used one-class support vector machine models to measure realised niche size, comparing decline in realised niche to decline in EOO through time. Ecological niche models (ENM) were then used to quantify environmental factors influencing the historical and contemporary realised niche, and to determine the extent to which environmental conditions may mediate threats (particularly introduced predators). Bilby EOO declined by 70% through time, while realised niche size declined by 46%. Fire frequency was an important predictor in both the historical and contemporary ENMs, while red fox (Vulpes vulpes) density became important only in the contemporary ENM, suggesting that foxes are contributing to contemporary bilby declines. Bilbies contracted to areas with lower fox densities, lower average normalised difference vegetation index values, higher fire frequency, and higher average temperatures. Environmental conditions likely limit fox distribution (leading to contraction of bilbies to fox-free areas) and/or mediate fox impacts (leading to greater population resilience to fox predation). Future research should enhance understanding of how environmental factors facilitate predator impacts and how these vary across environmental space. Such knowledge will likely improve understanding of how to manage threats facing bilbies across their distribution.
求助全文
约1分钟内获得全文 求助全文
来源期刊
Biological Conservation
Biological Conservation 环境科学-环境科学
CiteScore
10.20
自引率
3.40%
发文量
295
审稿时长
61 days
期刊介绍: Biological Conservation is an international leading journal in the discipline of conservation biology. The journal publishes articles spanning a diverse range of fields that contribute to the biological, sociological, and economic dimensions of conservation and natural resource management. The primary aim of Biological Conservation is the publication of high-quality papers that advance the science and practice of conservation, or which demonstrate the application of conservation principles for natural resource management and policy. Therefore it will be of interest to a broad international readership.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信